#!/bin/bash
IMAGE=$HOME/.lockscreen.jpg
SCROT_APP=grim
SCROT_ARGS=" -t jpeg"
LOCK_APP=swaylock
LOCK_ARGS=" -f -c 000000 -i $IMAGE"


function _app_exists() {
  which $1 &> /dev/null
  if [ $? -ne 0 ]; then
    echo "ERROR: missing app \"$1\""
    exit 1
  fi
}

function _clean() {
  rm -vf $IMAGE
}

function _lock() {
  _app_exists $LOCK_APP
  $LOCK_APP $LOCK_ARGS
}

function _off() {
  swaymsg "output * dpms off"
}

function _on() {
  swaymsg "output * dpms on"
}

function _screenshot() {
  _app_exists $SCROT_APP
  $SCROT_APP $SCROT_ARGS $IMAGE
  convert -blur 4x4 $IMAGE $IMAGE
}

mkdir -p $HOME/log
echo "lock: $(date) args: $*" >> $HOME/log/lock.log

case "$1" in
  lock)
    _on
    _screenshot
    _lock
    _clean
    ;;
  lockonly)
    _lock
    _clean
    ;;
  off)
    _screenshot
    _off
    ;;
  on)
    _on
    _clean
    ;;
  screenshot)
    _on
    _screenshot
    ;;
  *)
    echo "invalid argument \"$1\"."
    echo "arguments: [lock|lockonly|off|on|screenshot]"
esac